Deep Impact passed within 700 km (435 miles) of Comet Hartley 2 on November 4, returning pictures of the comet’s head which show the object to be shaped like a bowling pin. Comet Hartley 2 is about 1.6 km (1 mile) long. Deep Impact took several thousand images during its fly-by. This is the second cometary fly-by for Deep Impact, which had a fly-by and dropped an impactor on Comet Tempel 1 in 2005.